From d6583bb2a13f329cf0332ef2570eb8bb8fc0e39c Mon Sep 17 00:00:00 2001 From: Theo de Raadt Date: Wed, 18 Oct 1995 08:53:40 +0000 Subject: initial import of NetBSD tree --- usr.sbin/tcpdump/print-icmp.c | 217 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 217 insertions(+) create mode 100644 usr.sbin/tcpdump/print-icmp.c (limited to 'usr.sbin/tcpdump/print-icmp.c') diff --git a/usr.sbin/tcpdump/print-icmp.c b/usr.sbin/tcpdump/print-icmp.c new file mode 100644 index 00000000000..e4154315b4c --- /dev/null +++ b/usr.sbin/tcpdump/print-icmp.c @@ -0,0 +1,217 @@ +/* $NetBSD: print-icmp.c,v 1.3 1995/03/06 19:11:13 mycroft Exp $ */ + +/* + * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that: (1) source code distributions + * retain the above copyright notice and this paragraph in its entirety, (2) + * distributions including binary code include the above copyright notice and + * this paragraph in its entirety in the documentation or other materials + * provided with the distribution, and (3) all advertising materials mentioning + * features or use of this software display the following acknowledgement: + * ``This product includes software developed by the University of California, + * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of + * the University nor the names of its contributors may be used to endorse + * or promote products derived from this software without specific prior + * written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +#ifndef lint +static char rcsid[] = + "@(#) Header: print-icmp.c,v 1.20 94/06/14 20:17:39 leres Exp (LBL)"; +#endif + +#include +#include +#include +#include + +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "interface.h" +#include "addrtoname.h" + +void +icmp_print(register const u_char *bp, register const u_char *bp2) +{ + register const struct icmp *dp; + register const struct ip *ip; + register const char *str; + register const struct ip *oip; + register const struct udphdr *ouh; + register int hlen, dport; + register const u_char *ep; + char buf[256]; + +#define TCHECK(var, l) if ((u_char *)&(var) > ep - l) goto trunc + + dp = (struct icmp *)bp; + ip = (struct ip *)bp2; + str = buf; + /* 'ep' points to the end of avaible data. */ + ep = snapend; + + (void)printf("%s > %s: ", + ipaddr_string(&ip->ip_src), + ipaddr_string(&ip->ip_dst)); + + TCHECK(dp->icmp_code, sizeof(dp->icmp_code)); + switch (dp->icmp_type) { + case ICMP_ECHOREPLY: + str = "echo reply"; + break; + case ICMP_UNREACH: + TCHECK(dp->icmp_ip.ip_dst, sizeof(dp->icmp_ip.ip_dst)); + switch (dp->icmp_code) { + case ICMP_UNREACH_NET: + (void)sprintf(buf, "net %s unreachable", + ipaddr_string(&dp->icmp_ip.ip_dst)); + break; + case ICMP_UNREACH_HOST: + (void)sprintf(buf, "host %s unreachable", + ipaddr_string(&dp->icmp_ip.ip_dst)); + break; + case ICMP_UNREACH_PROTOCOL: + TCHECK(dp->icmp_ip.ip_p, sizeof(dp->icmp_ip.ip_p)); + (void)sprintf(buf, "%s protocol %d unreachable", + ipaddr_string(&dp->icmp_ip.ip_dst), + dp->icmp_ip.ip_p); + break; + case ICMP_UNREACH_PORT: + TCHECK(dp->icmp_ip.ip_p, sizeof(dp->icmp_ip.ip_p)); + oip = &dp->icmp_ip; + hlen = oip->ip_hl * 4; + ouh = (struct udphdr *)(((u_char *)oip) + hlen); + dport = ntohs(ouh->uh_dport); + switch (oip->ip_p) { + case IPPROTO_TCP: + (void)sprintf(buf, + "%s tcp port %s unreachable", + ipaddr_string(&oip->ip_dst), + tcpport_string(dport)); + break; + case IPPROTO_UDP: + (void)sprintf(buf, + "%s udp port %s unreachable", + ipaddr_string(&oip->ip_dst), + udpport_string(dport)); + break; + default: + (void)sprintf(buf, + "%s protocol %d port %d unreachable", + ipaddr_string(&oip->ip_dst), + oip->ip_p, dport); + break; + } + break; + case ICMP_UNREACH_NEEDFRAG: + (void)sprintf(buf, "%s unreachable - need to frag", + ipaddr_string(&dp->icmp_ip.ip_dst)); + break; + case ICMP_UNREACH_SRCFAIL: + (void)sprintf(buf, + "%s unreachable - source route failed", + ipaddr_string(&dp->icmp_ip.ip_dst)); + break; + } + break; + case ICMP_SOURCEQUENCH: + str = "source quench"; + break; + case ICMP_REDIRECT: + TCHECK(dp->icmp_ip.ip_dst, sizeof(dp->icmp_ip.ip_dst)); + switch (dp->icmp_code) { + case ICMP_REDIRECT_NET: + (void)sprintf(buf, "redirect %s to net %s", + ipaddr_string(&dp->icmp_ip.ip_dst), + ipaddr_string(&dp->icmp_gwaddr)); + break; + case ICMP_REDIRECT_HOST: + (void)sprintf(buf, "redirect %s to host %s", + ipaddr_string(&dp->icmp_ip.ip_dst), + ipaddr_string(&dp->icmp_gwaddr)); + break; + case ICMP_REDIRECT_TOSNET: + (void)sprintf(buf, "redirect-tos %s to net %s", + ipaddr_string(&dp->icmp_ip.ip_dst), + ipaddr_string(&dp->icmp_gwaddr)); + break; + case ICMP_REDIRECT_TOSHOST: + (void)sprintf(buf, "redirect-tos %s to host %s", + ipaddr_string(&dp->icmp_ip.ip_dst), + ipaddr_string(&dp->icmp_gwaddr)); + break; + } + break; + case ICMP_ECHO: + str = "echo request"; + break; + case ICMP_TIMXCEED: + TCHECK(dp->icmp_ip.ip_dst, sizeof(dp->icmp_ip.ip_dst)); + switch (dp->icmp_code) { + case ICMP_TIMXCEED_INTRANS: + str = "time exceeded in-transit"; + break; + case ICMP_TIMXCEED_REASS: + str = "ip reassembly time exceeded"; + break; + } + break; + case ICMP_PARAMPROB: + if (dp->icmp_code) + (void)sprintf(buf, "parameter problem - code %d", + dp->icmp_code); + else { + TCHECK(dp->icmp_pptr, sizeof(dp->icmp_pptr)); + (void)sprintf(buf, "parameter problem - octet %d", + dp->icmp_pptr); + } + break; + case ICMP_TSTAMP: + str = "time stamp request"; + break; + case ICMP_TSTAMPREPLY: + str = "time stamp reply"; + break; + case ICMP_IREQ: + str = "information request"; + break; + case ICMP_IREQREPLY: + str = "information reply"; + break; + case ICMP_MASKREQ: + str = "address mask request"; + break; + case ICMP_MASKREPLY: + TCHECK(dp->icmp_mask, sizeof(dp->icmp_mask)); + (void)sprintf(buf, "address mask is 0x%08x", + ntohl(dp->icmp_mask)); + break; + default: + (void)sprintf(buf, "type-#%d", dp->icmp_type); + break; + } + (void)printf("icmp: %s", str); + return; +trunc: + fputs("[|icmp]", stdout); +#undef TCHECK +} -- cgit v1.2.3